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The elements in the human body are shown in Figure 1, beginning with the most abundant: oxygen (O), carbon (C), hydrogen (H), and nitrogen (N). Each element’s name can be replaced by a one- or two-letter symbol; you will become familiar with some of these during this course.
These four elements—oxygen, carbon, hydrogen, and nitrogen—together make up more than 95 percent of the mass of the human body, and the body cannot make elements, so it is helpful to have them in consumables.
4 Σεπ 2024 · Additionally, 96.2% of the human body's mass is made of only four elements: oxygen, carbon, hydrogen, and nitrogen. Oxygen (O) - 65% - Oxygen and hydrogen form water—the primary solvent in the body—which regulates temperature and osmotic pressure.
An electron shell is a layer of electrons that encircle the nucleus at a distinct energy level (Figure 3.2). The elements found in the human body have from one to five electron shells; the first shell holds up to two, the second shell holds up to eight, the third shell holds up to eighteen.
The elements in the human body are shown in Figure 2.1.1, beginning with the most abundant: oxygen (O), carbon (C), hydrogen (H), and nitrogen (N). Each element’s name can be replaced by a one- or two-letter symbol; you will become familiar with some of these during this course.
The elements in the human body are shown in Figure 2.2, beginning with the most abundant: oxygen (O), carbon (C), hydrogen (H), and nitrogen (N). Each element’s name can be replaced by a one- or two-letter symbol; you will become familiar with some of these during this course.
In nature, elements rarely occur alone. Instead, they combine to form compounds. A compound is a substance composed of two or more different elements joined by chemical bonds. For example, the compound glucose is an important body fuel. It is composed of the elements: carbon, hydrogen, and oxygen.
